403878881281 has 4 divisors (see below), whose sum is σ = 404191724464. Its totient is φ = 403566038100.

The previous prime is 403878881251. The next prime is 403878881299. The reversal of 403878881281 is 182188878304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 403878881281 - 2³⁵ = 369519142913 is a prime.

It is a super-3 number, since 3×403878881281³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403878881251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156419655 + ... + 156422236.

It is an arithmetic number, because the mean of its divisors is an integer number (101047931116).

Almost surely, 2^403878881281 is an apocalyptic number.

It is an amenable number.

403878881281 is a deficient number, since it is larger than the sum of its proper divisors (312843183).

403878881281 is a wasteful number, since it uses less digits than its factorization.

403878881281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312843182.

The product of its (nonzero) digits is 5505024, while the sum is 58.

The spelling of 403878881281 in words is "four hundred three billion, eight hundred seventy-eight million, eight hundred eighty-one thousand, two hundred eighty-one".